Democracy is, by its very nature, often rude. But there are limits to how uncivil we should be. In her timely and important book, "Rude Democracy, "Susan Herbst explores the ways we discuss public policy, how we treat each other as we do, and how we can create a more civil national culture. aHerbst uses the examples of Sarah Palin and Barack Obama to illustrate her case. She scrutinizes Palin as both victim and perpetrator of incivility, including...